According to Wikipedia, on October 10, 1973, "Vice President of the United States Spiro Agnew resigns after being charged with federal income tax evasion." Maybe that has something to do with it?
Glasgow Stock Exchange ended in 1973.
Kojak - 1973 An Unfair Trade 4-6 was released on: USA: 31 October 1976 Germany: 11 October 1991
The F-B-I- - 1965 The Exchange 9-5 was released on: USA: 21 October 1973
The Program Exchange was created in 1973.
Bradford Exchange was created in 1973.
October 15th 1973 was a Monday
October 13 1973 was a Saturday.
October 5, 1973, was a Friday.
October 23, 1973 was a Tuesday.
October 27 1973 was a Saturday.
October 21, 1973 was a Sunday.
October 8, 1973 fell on a Monday.